BTEC Level 4 Unit H20: Digital Principles

Pearson/Edexcel BTEC Level 4 Engineering – Digital Principles

Tecol Unit Code: L4E-H20
BTEC Code: T/615/1494
Format: On-line
Award: Level 4 Unit
Accreditation: EDEXCEL
Study + Assessment Time: 60 + 90 Hours
Credit value 15

This unit can be studied  as part of a BTEC HNC or HND in Engineering. 


Unit introduction

While the broad field of electronics covers many aspects, it is digital electronics which now has the greatest impact. This is immediately evident in the mobile phone, laptop, and numerous other everyday devices and systems. Digital electronics allows us to process, store, and transmit data in digital form in robust ways, which minimises data degradation.

The unit introduces the two main branches of digital electronics, combinational and sequential. Thus, the student gains familiarity in the fundamental elements of digital circuits, notably different types of logic gates and bistables. The techniques by which such circuits are analysed, introduced and applied, including Truth Tables, Boolean Algebra, Karnaugh Maps, and Timing Diagrams.

The theory of digital electronics has little use unless the circuits can be built – at low cost, high circuit density, and in large quantity. Thus the key digital technologies are introduced. These include the conventional TTL (Transistor-Transistor Logic) and CMOS (Complementary Metal Oxide Semiconductor). Importantly, the unit moves on to programmable logic, including the Field Programmable Gate Array (FPGA). Finally, some standard digital subsystems, which become important elements of major systems such as microprocessors, are introduced and evaluated.

On successful completion of this unit youwill have a good grasp of the principles of digital electronic circuits, and will be able to proceed with confidence to further study.


On completion of this unit you should:

  1. Investigate the constructional features and applications of electrical distribution systems.
  2. Examine the types and applications of electrical motors and
  3. Analyse the types of lighting circuits available in the industry by assessing their practical
  4. Explain the operating characteristics of electrical safety

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